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A student has a water sample containing 0.499g of NaH2PO4*H2O dissolved in water. This releases 1 mole phosphate per mole NaH2PO4*H2O into the water. The student precipitates the phosphate in the water as struvite, vacuum filters to get the precipitate and quickly weighs the product. The mass of the student's impulsive is 1.3245 g. A fellow student Compute the % yield and says "These numbers don't make any sense!" Explain what is the percent yield of this students result?
a photon in the gamma ray region of the electromagnetic spectrum has an energy of 9.12 times 10-14 j calculate the wave
What is the molarity of C6H12O6 in an aqueous solution that is prepared by dissolving a 20.95 g sample of impure C6H12O6 in water to make 1,450 mL of solution. Assume that the sample is 93% C6H12O6 by mass. Enter your answer in mol/L, accurate to ..
If 69.5 kJ of heat is applied to a 1032 g block of metal, the temperature of the metal increases by 11.4°C. Calculate the specific heat capacity of the metal in J/g°C.
Which of the following statements concerning the complete hydrolysis of fats and oils is correct. fats produce more fatty acids per molecule than do oils
At the boiling point of benzene Delta Hvap=30.78 kJ/mol and Delta Svap=87.15 j/(mol * K). Determine the normal boiling temperature in degrees Kelvin for C6H6.
Write structural formulas for all of the possible isomers of -pentyne that can be formed by moving the position of the triple bond
What current (in Amps) is required to plate out 1.22 g of nickel metal from a solution of Ni2+ in 1 hour
Calculate the reversible potential difference between the two wires when the activity of dissolved zinc chloride is 0.01 molal (mol/kg H20). Indicate the direction of the spontaneous reaction and the sign of the electrodes.
what is the bronsted-lowry definition of an acid ,and how does thiss affect the concentration of H+ in a solutin?
what is the molar concentration of phosphate ion in a 2.5 m aqueous solution of phosphoric acid
To avoid handling the powder form of this compound you decide to make up the whole bottle rather than attempt to weigh out a portion. The compound comes in 200 mg batches. What volume would you add to one of these bottles to make up a 10 mM soluti..
What is the internal energy change for the system if 969 joules of heat flows into the system from the surroundings and 253 joules of work is done by the system on the surroundings
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